Ternary Ni–Co–Fe Exsolved Nanoparticles/Perovskite System for Energy Applications: Nanostructure Characterization and Electrochemical Activity,ACS Applied Energy Materials

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Ternary Ni–Co–Fe Exsolved Nanoparticles/Perovskite System for Energy Applications: Nanostructure Characterization and Electrochemical Activity
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-09-24 , DOI: 10.1021/acsaem.0c01997
Mariano Santaya ₁ , Horacio E. Troiani _{2,

3} , Alberto Caneiro ₄ , Liliana V. Mogni _{1,

3}

Affiliation

The exsolution of Ni–Co–Fe from a Sr_0.93(Ti_0.3Fe_0.56Ni_0.07Co_0.07)O_3−δ perovskite (STFNC) is explored as a strategy to produce electrochemically active electrodes for symmetric-SOFC (S-SOFC). It was found that a nanostructured NiCoFe ternary alloy phase, with approximately equal amounts of each metal, can be formed by this method. The STFNC electrode is studied via electrochemical impedance spectroscopy, showing a really interesting potential as S-SOFC electrode: the anode polarization resistance was 1.12 Ω·cm² in a wet 10%H₂ atmosphere at 700 °C (exsolving in situ the NiCoFe phase), and the cathode polarization resistance at 700 °C in air was 0.054 and 0.042 Ω·cm², before and after exsolution, respectively.

中文翻译：

用于能源应用的三元镍钴铁溶解纳米颗粒/钙钛矿体系：纳米结构表征和电化学活性

研究了从Sr _0.93（Ti _0.3 Fe _0.56 Ni _0.07 Co _0.07）O3 _-δ钙钛矿（STFNC）中去除Ni-Co-Fe作为制备对称SOFC（S-SOFC）电化学活性电极的策略。已经发现，通过这种方法可以形成具有大致相等量的每种金属的纳米结构的NiCoFe三元合金相。通过电化学阻抗谱对STFNC电极进行了研究，它显示出作为S-SOFC电极非常有趣的潜力：在湿10％H _2中，阳极极化电阻为1.12Ω·cm ²。在溶出之前和之后，在700℃的大气中（原位溶解NiCoFe相）和在700℃的空气中的阴极极化电阻分别为0.054和0.042Ω·cm ²。

更新日期：2020-10-26

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